Paint composition



WILLIAM H. BLAKEMAN, Jlt, OF MOUNT VERNON, NEW YORK.

PAINT CDMPOSITION.

masses.

N 0 Drawing.

To (ZZZ whom it may concern:

Be it known that 1, WILLIAM N. BLAKE- MAN, J r., a citizen of the UnitedStates, and resident of the city of Mount Vernon, in the county oflVestchester and State of New York, have invented a new and useful PaintComposition, which invention is fully set forth in the followingspecification.

The object of this invention is to produce a paint-composition whichwill show an increased resistance to weathering attacks and form a morepermanent covering than the compositions now in use.

The present system of structural painting is largely based upon theunique union of Dutch white lead as a pigment and linseed oil as avehicle. These, when properly ground together, form a hydrated metallicsoap, which, when spread on a plain surface, furnishes a smooth andhomogeneous insoluble film. The atmospheric elements, however, soonattack the bond, which is the oil vehicle, in this combination, andcause it to pass by insensible gradations from an insoluble to a solublecondition, relaxing thebonding effect, releasing the pigment, and thusrapidly disintegrating the paint. This early destruction of the presentpaint films, by atmospheric hydrolysis, aided by a weak alkalinereaction of the Dutch white lead pigment, is owing to the yieldingcharacter of linseed oil to weak hydrolytic influences; as, being strongin its oxygen affinities, it is feeble in its resistance .to even weakatmospheric hydrolytic action, becoming progressively sensitive toincipient hydrolysis by its progressive oxidation.

I have discovered that this disintegration of all such oil-paint filmscan be delayed very greatly in its inception, and its progressivedevelopment indefinitely retarded, by rein forcing and fortifying theoil-vehicle with non-drying oils or fats showing a resistance to feeblesaponifying attack or a repellent indifference to incipient atmospherichydrolysis, so that, such non-drying oils or fat-s will enter intocombination with any drying-oil-vehicle, or drying-oil paint-compound.

The non-drying oils or fats which may be used are those belonging to thegroup of vegetable fatty oils, and of these, I prefer cocoanut oil andpalm-kernel oil (or palm nut oil) both of, which have a high resistanceto weak hydrolytic action. These sub stances, which are flowing oils atsummer Specification of Letters Patent.

Application filed October- 5, 1921.

Patented July 18, 1922.

Serial No. 505,624.

heats, but chill to a solid or semi-solid condition at somewhat lowertemperatures, are miscible with and soluble in oil vehicles by the aidof heat and can be introduced to the extent of from 5% to 20%, and willnot cloud, flock, or chill out, but will remain in clear solution attemperatures very much below their thickening point. The result will bea great improvement in the spreadmg power of the vehicle for allpigments, particularly anhydrous pigments, and an increased resistanceof the paint to atmospheric and abrasive influences.

Because of its abundance on the market, I prefer to use cocoanut oil,and if five or six parts of linseed oil, carrying 10% of cocoanut oil,be ground with twelve parts of Dutch white lead, and spread on a plainsurface, the mixture will firm to the touch in eight or nine hours,under favorable atmospheric conditions, and subsequently indurate into adurable film, the resistance of the film to the elements being stronglysupported by the presence of the cocoanut oil, and the life ofthe paintgreatly prolonged. I have further discovered, that tung oil is a veryefficient solvent for these non-drying oils) and fats even at commontempera tures, when they are in a solid or semi-solid condition, and,when added in the proportion of from 12% to 15% to the oil-vehicle,prevents clouding or flocking at temperatures approaching freezing, andreduces the firming of the paint to onethird or one-half the timethus:If five or six parts of linseed oil, carrying 10% of cocoanut oil and15% of tung oil, be ground with twelve parts of Dutch white lead, andspread on a plain surface, the mixture will firm to the touch in from.two and one-half to three hours, under favorable atmospheric conditions,and subsequently indurate into a permanent film resistant to atmosphericand abrasive influence. A mixture of six parts of cotton-seed oilcarrying 15% of tung oil and 10% of cocoanut oil, and ten parts ofzinc-lead (composed of zinc oxide and 40% lead sulphate) will firm tothe touch in four or five hours under like atmospheric conditions. Verysatisfactory compositions can be formed, especially with anhydrouspigments, by using in the vehicle a proportion of a mineral oil of theTexas type, either in an untreated. condition, or hydrogenated oroxidized or both; or a mineral oil of the Pennsylvania type,hydrogenated or 0xidized, or both. I prefer oxidized Texas oil. 7 Thus,if six parts of cottonseed oil, carrying 5% of cocoanut oil, 15% of tungoil and 10% of oxidized Texas oil, be ground with ten parts ofzinc-lead, the mixture, when spread, will firm and induratesatisfactorily and form an economical and permanent aint.

lVith slight changes in proportions of vehicles and pigments, all theoils (drying, semi-drying, nondrying, and mineral) and all the pigments(hydrated and anhydrous) which fall Within the economical scope of thepainting art, can be employed. The proportions of the various factors inthe composition, will be governed by the character of the pigments andvehicles used, and the results desired. a

In all cases, the usual proportion of a suit able commercial drier is tobe used.

It will, of course, be understood that by the term oil, as used in thisspecification I and in the claims, to designate the vegetable in suchnon-drying oils, is specifically claimed in application No. 505625 filedherewith. Q

Having thus fully described my invention, I claim:

1. A paint-co1nposition, carrying a pro portion of non-drying vegetablefatty oil of high resistance to hydrolysis. a

:2. A paint-composition carrying a proportion of cocoanut oil.

8. A paint-composition carrying a proportion of non-drying vegetablefatty oil of high resistance to hydrolysis, and tun'g oil;

1. A paint-composition carrying a proportion of oocoanut oil and tungoil.

A paint-composition comprising a fatty oil; a pigment; and a non-dryingvegetable fatty oil of high resistance to hydrolysis.

6. A paint-composition comprising a fatty oil; a pigment and cocoanutoil.

7. A paint-composition comprising a fatty oil; a pigment; a non-dryingvegetable fatty oil of high resistance to hydrolysis; and tung oil.

8. A paint composition coin'prisiuga fatty oil; a pigiiei i t; cocoanutoil; and tung oil.

9-; A paintoomposition comprising a fatty oil; a pigment; a non-dryingvegetable fatty oil of highresistance tohydrolysis; tung oil; and amineral oil. i

10. A paint-composition comprising a fatty oil; a pigment; cocoanut oil;tung oil; and a mineral oil.

WM. N1 BLAKEMAN, JR.

